moyee



(No Model.)

G. GRUNDER & JLH. MOYER.

ROLL MADE FROM LEATHER DISKS. No. 289,910.

Patented Dec. 11,1883.

N. PEERs. Fboiu-Lilhognphor, wuhlnmn. 04C.

' STATES ATENT FFICE. A

RQLL MADE FROM LEATHER DISKS.

SPECIFICATION forming part of. Letters Patent No. 289,910, datedDecember 11,- 1883.

Application filed September 15. 1883.

To all whom, it may concern Be it known that we, CHRISTIAN GRU'NDER Iand JOSEPH H. BIOYER, citizens of the United States, residing at thecity of Reading, county of Berks, and State of Pennsylvania, haveinvented a new and useful Improvement in the Construction of Rolls, ofwhich the following is a specification.

This improvement relates more particularly to the construction of rolls,in which it is desired with great hardness of surface to still retain acertain amount of elasticity, and that in use will not abrade or bruisethe article rolled on or rolling upon the same.

The object more particularly in View in this our invention is toconstruct a roller suitable for use in our thill-loop patent, No.279,151, of June 12, 1883, we having ascertained practically that it isthe only roller adapted thereto.

The drawings forming a part ofthis specification are so fully detailedthat very little expla nation is necessary to enable an expertto-construct the roll.

Like letters indicate like the drawings.

Figure l is a front elevation of a roll complete. Fig. 2 is alongitudinal sectional elevation of the same. showing alternative modesof securing the roll. Fig. 3 is a plan and side elevation of one of thedisks of which the roll is composed. Fig. 4 represents the bolts,screws, or rivets for securing the roll. Fig. 5 represents the endwashers in front and side elevation.

A represents the roll, composed of a series of disks cut from leather oran equivalent material; A, a hole central to the disks, forming, whencombined with each other, the wearingsurface upon the pin or shaft ofthe roll when the samerevolves independent of the pin or shaft.

A A A are the clamping-holes for the reception of the bolts, screws 0,or riveting-pins D. The disks are cut and punched in a suitablepress-lever, screw, or hydraulicthe central hole, A, and theclamping-holes A being equidistant from each other, so that inassembling there need be no skill exercised to match the holes with eachother.

B B are the end clamps or washers, having holes B B B B correspondingwith the holes A A A A of the leather disks.

parts throughout (X0 model.)

, O are clamping-screws, and D are clampingrivets.

The construction of the roll is as follows, the description referring toa roll, as shown, to be used for a thill-loop: All scrap leather isavailable if large enough to form-a disk, and the pieces are placedunder the cutting and punching presses, and by one operation aredelivered complete, as shown in Fig. 3. The washers or clamps B aresimilarly produced.

The next operation is the assembling, which is as follows: A plateadapted to the press hasv a pin for the central hole, A and B, and atthe proper distance therefrom a pin for the holes A and B", the pinsbeing in height above the plate sufficient to produce a roll of thedesired length, due allowance being made for the shortening due tocompression. Thus prepared, a washer B is first placed on the plate overthe pins. Disk after disk of leather is then placed upon each otheruntil the proper height is attained. Another washer being placedcompletes the pile, which is transferred under a platen in connectionwith a screw, lever, or bydraulic press, and so arranged that it shallbear upon the washer B between the holes B and leavethesame clear. Theplaten isthen brought down with such pressure as will insure the closestcontact between the several disks, and, while held'in said position, inall the holes left clear the screws 0 are dropped through from the topwasher, and the screw-driver heads turned untiltheirthreaded endsengagewith the threaded holes of the lower washer; or, bolts or rivetsbeing used, the same are thrust up from below and the nuts screwed up,or, the rivethead being supported by a tool from below, the top end isriveted over the upper washer. Either style perfectly secures the disks.The pressure is now withdrawn, the roll released,

and the hole occupied by the pin of the plate of thill-loop rollers toput them together dry. lVe have, for the purpose described, testedmetal, vulcanite, rubber, and wood, and found all to be inferior to aroll of leather constructed as shown.

We are aware that calender-rolls have been constructed of paper diskssomewhat in the manner we have herein shown, and that rollerblocks forstirrup-straps have been constructed of leather disks loosely strungtogether upon a central bolt. In this case, however, it was not intendedthat the block should revolve, its functional duty being to separate theends of the stirrup and adjust the same to the width of strap to be usedtherewith. As to the calender-rolls, their use is not for and would beunsuited to a purpose analogous to ours.

WVhen the roller is secured to the shaft and revolves with the same,keyways would be provided in the washers B and key-seats in the shaft. Akey in combination therewith would then retain the roller in place.

o make no special claim to any machinery to be used for the purpose ofgetting out the disks and washers, or for compressing the same, as it isevident that many ways of equal convenience with those suggested may beused for the purpose.

The rolls may be formed upon a hollow metal spindle having an integralcollar at one end, the opposite end of the spindle threaded to interlockwith a loose threaded collar, which,

when the disks are in place, is screwed down upon the same until thedesired length and compression is produced. We prefer, however, the planshown, as cheaper in production CHRISTIAN GRUNDER. JOSEPH H. MOYER.

lVitn esses:

THOMAS LANGAN, J OHN HIPPLE.

